Blowpipe.



W. KIRKWOOD.

BLOWPIPE.

APPLICATION IILBD MAR. 6, 1911.

Patented June 18, 1912.

WIILLIAM KIRKWOO'D, OF CHICAGO, ILLINOIS.

BLGWPIPE.

.-, scification of Letters Patent.

Patented Juno 1 8, 1912.

Application filed March 6, 1911. Serial 1%. 612,664.

To all whom it may concern." 7 Be it known that l, VJILLIAM Kmmvoob,

citizen of the United States, and a reJ'1-' dent of Chicago, in the county of Cook a d State of Illinois, haveinvented certain new and useful Improvements in Blowpipes, of

which the following is a full, clear, and ex-' act specification. v

This invention relates to improvements in blow pipes for directing the flame from ami:tture of carbureted hydrogen (2 e. hydrogen saturated with a hydrocarbon) and oxygen, employed for the purpose of welding and severing bars, columns, beams and other articles of iron and steel, by directing their flame froma blow pipe against the point or line of surtacethereof at which their severing is desired until melted apart.

Prior to my invention blow pipes, employed for the purposes above described, have been so constructed that their oxygen and carbureted hydrogen gases are respectively discharged in a single stream into a chamber, one of which streams is solid and surrounded by the other, so that their mix ture is not as perfect as should be for ob taining the best effects of their flame, and, furthermore, the pointat which these gases are ignited is so far removed from that at which they first come in contact with each other that when. the force of these streams is below the maximum required for the successful use of their flame, there is a. constant tendency of the flame to back-flash, and this increasingly with the reduction in force, with the result that. an effective operation of the pipe is prevented by internal melting, not infrequently to a degree destructive of the further use of the pipe.

The object of my invention is blow pipe, adapted for the purposes above described, so constructed that it is impossible for a flame, produced from a mixture of oxygen and carbureted hydrogen, to back-[lash into the pipe at any force it may have, however great or small that force may be, and by elite. producea back flame than that of a flame" such means as makes it possible and practical to combine with carbureted hydrogen another material, such for example as bisulfid or. carbon, and thereby the production of a gas better adapted for the purposes of a welding and particularly a severing flan, and which has heretofore been prohibited because of its substantially greater tendency,

produced by carbureted hydrogen with oxygen.

A further object of my invention is to have a blow pipe so constructed that the internal parts thereof are conveniently {10- c essible for the removal of possible obstructions at any point, and at the same time reduce its cost and simplicity of construction to a minimum lVith these ends in view, my invention finds embodiment in I certain features of novelty in the construction, combination and arrangement of parts by which the said objects and certain other objects are hereinafter attained, all as fully described with reference to the accompanying drawings and more particularly pointed out in the claims.

In said drawings: Figure 1 illustrates in section and on an enlarged scale a blow pipe nozzle embodying my invention. Fig. 2 is,

an enlarged tlllIlSVQlCl section on the line 2-2 of Fig. 1 looking in the direction of the arrows; and, Fig. 3 IS a section on the line 3 3 or' Fig. 1 looking in the direction of the arrows.

Similar characters of reference indicate the some parts in the several figures of the drawings.

4: indicates a pipe screwed into an elbow in which 18 a chamber (3, to which, from a suitable source, there is supplied, through the pipe 4, either oxygen or carbureted hydrogen. The chamber 1S closed atone end by a perforated plate 7 in a coupling 8, in-

ternally forming a chamber 9, to which either oxygen or carbureted hydrogen may be supplied through the pipe lOfrom any suitable source, the supply therethrough being regulated by a stop cock 11 in the pipe 1O and in the pipe t by a stop cock 12.

Screwed into the end oi: the coupling 8 is nozzle 13, into which projects a plurality or series of pipesl l surrounding a central pipe 15, moved from the end of the nozzle, th bore of them 116 being tapered, as indicatetl at 16, and thereby forming an annular cham her about the pipe' facilitating the" ischarge of the contexts of tlie chamber 9.

The tubes 1.4 and 15 are tight in the .plate 7 and open into the chamber 6, thereby receiving and. discharging the contents of said chamber, the arrangement of the tubes being such as to provide between them pas- 1 10 terminating at a point shortly relot" sages for discharge eenieisis '01 are in contact with each other ,beyonei the base of the nozzie for & port-ion of their length, iiiiiii weii iowen'i 'i'hfilf outer ends, and the eenirei tube 1% iieeymserteii therein and projecting (here's one e tube to form an annular sp oe surrounding the cenirei -'nube l4, facilitating "she discharge oi the surrounding gas or iiquid, as may be, at the extreme end of the whe s, anci of whiciiit may be said in preoiiee they are s0 small time their openings are substantially needie like, for the reason iiiat the i est mixiure of the ewe gases is obieineii when reduced co :1 spray-like condition, and they are diseimrged with "ch greatest possibie force at their point igniiieii which. iinmefii :ii'eiy adjacent the ends 0i? he takes.

While it would be no subs iitiai iepari JlB from n'iyinveniien i0 exienl iiie mi! 1-2: and 1.5 to e poet fiusiiwich the en he nozzle 13, I fins. iTi practice shat Zoeiier' iheve the i-ubessuiiioieni-iy shot s point to form a chamber 1?, for as doing ii'ziiospherie air is bester exoiuded end the flame directed in e 01 m against ihe opposi surface to is epbii-eci', and, in "ehis cennection iopei i'o observe that provision is y i adjusting the depth. of this chemshe SCI'GFN iiirea'ciing of the nozzle into its coupling,

The essential feature of my invention resides in the maintaining of the We gases sep- "vied up to the instant chat they are ignited, and discharging them in fine jets in the presence of each oihei whereby they are effectively inteieningieyenei at the i'isio end by reason sf these tiividefi epenings flame of eiiese gases to the internei v of like blow pipe rem cieied imposeio is therefore, not essentiai to these principal features of my invention that the several parts shouici be detachable, or that the chambers receiving claim and desire to secure by Letters Pat-.

scribed, comprising in eombineiion a series 1 ei pipes, a number of'jet passages be pipes sepe "ate receiving clieiiioeis for said pipes and passages, and means for supply ing different gases #0 said ehs moers subsianiieliy as described. i

.A blow pipe for file oses Cieseribeci, comprising in eomfii eeuen e 1102 zie, a series (if jet pipes inoiosed by said nozzie and terminating e"'short distance the en i ihereefl e series of jet 'piis,

etween and inciosed by the outei oi. said jet pipes, and means for supoiying; eiemm gases to said pipes and passages substeniieily as describeci.

3 A blow pipe for thePUKPOSS'dQSCFibEd; oinprising in combination a ne'zzie, a pin i-eiiiy of jet pipes Within said nezzie con testing with each other and terminating tower-d the ester end thereof, a series of jet passages between and incioseci by the outer walls of e jet pipes, and separate siipggiy chambers for seici"pipes and passages for centeiningdifiei'ent gases simuiizeneousiy discharged enci intermin led, in spray-like ms in the presence o eeeii ether about .iween and inciosed by the Walls of said the of the 316221631 subsientieiiy as deseribezi. v i In wliness whereofyi have hereunto -setv my hen i and afixed my see], this 1st day of Mme A. D. 1911, V q o iriiiiseii' KIRKWUGD V {1.8.3 

